RU2010118486A - Scrambing codes for secondary synchronization codes in wireless communication systems - Google Patents

Scrambing codes for secondary synchronization codes in wireless communication systems Download PDF

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Publication number
RU2010118486A
RU2010118486A RU2010118486/08A RU2010118486A RU2010118486A RU 2010118486 A RU2010118486 A RU 2010118486A RU 2010118486/08 A RU2010118486/08 A RU 2010118486/08A RU 2010118486 A RU2010118486 A RU 2010118486A RU 2010118486 A RU2010118486 A RU 2010118486A
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Prior art keywords
set
scrambling codes
possible
code
psc
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RU2010118486/08A
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Russian (ru)
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RU2450480C2 (en
Inventor
Тао ЛО (US)
Тао ЛО
Арун П. КАННУ (US)
Арун П. Канну
Ке ЛЮ (US)
Ке Лю
Питер ГААЛ (US)
Питер ГААЛ
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Квэлкомм Инкорпорейтед (US)
Квэлкомм Инкорпорейтед
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Priority to US60/979,357 priority
Priority to US12/245,931 priority
Priority to US12/245,931 priority patent/US8503547B2/en
Application filed by Квэлкомм Инкорпорейтед (US), Квэлкомм Инкорпорейтед filed Critical Квэлкомм Инкорпорейтед (US)
Publication of RU2010118486A publication Critical patent/RU2010118486A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069Cell search, i.e. determining cell identity [cell-ID]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/70735Code identification
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7083Cell search, e.g. using a three-step approach
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/0007Code type
    • H04J13/0011Complementary
    • H04J13/0014Golay
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks ; Receiver end arrangements for processing baseband signals
    • H04L25/03828Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • H04L27/2613Structure of the reference signals per se
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/0007Code type
    • H04J13/0055ZCZ [zero correlation zone]
    • H04J13/0059CAZAC [constant-amplitude and zero auto-correlation]
    • H04J13/0062Zadoff-Chu

Abstract

 1. A method that facilitates scrambling synchronization codes in a wireless communication environment, comprising:! selecting a scrambling code from the set of possible scrambling codes depending on the index of the primary synchronization code (PSC), and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation; ! scrambling the secondary synchronization code (SSC) using the selected scrambling code; and! transmit the scrambled SSC. ! 2. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a separate M-sequence, and each of the individual M-sequences is formed from a dissimilar generating polynomial. ! 3. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a common M-sequence with a dissimilar cyclic shift, and the common M-sequence is formed from a common generating polynomial. ! 4. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a binary approximation of the corresponding PSC from the set of possible PSCs, possible PSCs are formed from Zadov-Chu sequences, and the binary approximation includes quantized values of I and Q complex numbers contained in possible PSC. ! 5. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a corresponding complementary Gowley sequence. ! 6. The method according to claim 1, further comprising forming possible scrambling codes. ! 7. The method according to claim 1, further comprising adjusting the length of one or

Claims (50)

1. A method that facilitates the scrambling of synchronization codes in a wireless communication environment, comprising
selecting a scrambling code from the set of possible scrambling codes depending on the primary synchronization code index (PSC), and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation;
scrambling the secondary synchronization code (SSC) using the selected scrambling code; and
transmit the scrambled SSC.
2. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a separate M-sequence, and each of the individual M-sequences is formed from a dissimilar generating polynomial.
3. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a common M-sequence with dissimilar cyclic shift, and a common M-sequence is formed from a common generating polynomial.
4. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a binary approximation of the corresponding PSC from the set of possible PSCs, possible PSCs are formed from Zadov-Chu sequences, and the binary approximation includes quantized values of I and Q complex numbers contained in possible PSC.
5. The method according to claim 1, in which each of the possible scrambling codes in the set is based on a corresponding complementary Gowley sequence.
6. The method according to claim 1, further comprising forming possible scrambling codes.
7. The method according to claim 1, further comprising adjusting the length of one or more of the possible scrambling codes by at least one of truncating the bit, thinning the bit, or repeating one or more of the possible scrambling codes.
8. A wireless communication device comprising
a memory that stores instructions related to the selection of a scrambling code from the set of possible scrambling codes depending on the primary synchronization code index (PSC), and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation, scrambling a secondary synchronization code (SSC) using the selected scrambling code, and transmitting the scrambled SSC; and
a processor attached to memory configured to execute instructions stored in memory.
9. The wireless communications apparatus of claim 8, wherein the memory further stores instructions related to the formation of individual M-sequences from dissimilar respective generating polynomials and the use of individual M-sequences as possible scrambling codes in the set.
10. The wireless communications apparatus of claim 8, wherein the memory further stores instructions related to generating a common M-sequence from a common generating polynomial and creating possible scrambling codes in the set based on the common M-sequence and different respective cyclic shifts.
11. The wireless communications apparatus of claim 8, wherein the memory further stores instructions related to issuing binary approximations of the set of PSCs by quantizing the values of I and Q of the complex numbers included in each of the PSCs and using binary approximations of each of the set of PSCs as possible scrambling codes in the set.
12. The wireless communications apparatus of claim 8, wherein the memory further stores instructions related to generating a plurality of complementary Gowley sequences and using the plurality of complementary Gowley sequences as possible scrambling codes in the set.
13. The wireless communications apparatus of claim 8, wherein the memory further stores instructions related to changing the length of one or more possible scrambling codes in the set.
14. A wireless communication device that enables the use of signal scrambling for a secondary synchronization code in a wireless communication environment, comprising
means for selecting a scrambling code from the set of possible scrambling codes based on the primary synchronization code index (PSC), and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation;
means for scrambling the secondary synchronization code (SSC) using the selected scrambling code; and
means for sending a scrambled SSC downlink.
15. The wireless communications apparatus of claim 14, wherein each of the possible scrambling codes in the set is based on a separate M-sequence, and each of the individual M-sequences is formed from a dissimilar generating polynomial.
16. The wireless communications apparatus of claim 14, wherein each of the possible scrambling codes in the set is based on a common M-sequence with dissimilar cyclic shift, and a common M-sequence is formed from a common generating polynomial.
17. The wireless communications apparatus of claim 14, wherein each of the possible scrambling codes in the set is based on a binary approximation of the corresponding PSC from the set of possible PSCs, possible PSCs are generated from Zadov-Chu sequences, and the binary approximation includes quantized values of I and Q complex numbers contained in possible PSC.
18. The wireless communications apparatus of claim 14, wherein each of the possible scrambling codes in the set is based on a corresponding complementary Gowley sequence.
19. The wireless communications apparatus of claim 14, further comprising
means for generating possible scrambling codes; and
means for adjusting the lengths of at least one of the possible scrambling codes to match the SSC length.
20. A computer software product containing
machine-readable storage medium containing
a code for selecting a scrambling code from the set of possible scrambling codes depending on the primary synchronization code index (PSC), and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation;
a code for scrambling a secondary synchronization code (SSC) using the selected scrambling code; and
code for transmitting scrambled SSC.
21. The computer program product according to claim 20, wherein the computer-readable storage medium further comprises a code for generating individual M-sequences from dissimilar respective generating polynomials and a code for using individual M-sequences as possible scrambling codes in the set.
22. The computer program product according to claim 20, wherein the computer-readable storage medium further comprises a code for generating a common M-sequence from a common generating polynomial and a code for creating possible scrambling codes in a set based on a common M-sequence and different corresponding cyclic shifts.
23. The computer program product according to claim 20, wherein the computer-readable storage medium further comprises a code for generating binary approximations of the set PSC by quantizing the values of I and Q of complex numbers included in each of the PSC, and a code for using binary approximations of each of the set of PSC as possible scrambling codes in the set.
24. The computer program product according to claim 20, wherein the computer-readable storage medium further comprises a code for generating a plurality of complementary Gouley sequences and a code for using a plurality of complementary Gouley sequences as possible scrambling codes in the set.
25. A device in a wireless communication system, containing
processor configured for
selecting a scrambling code from the set of possible scrambling codes based on the primary synchronization code index (PSC), and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation; and
scrambling the secondary synchronization code (SSC) using the selected scrambling code.
26. A method that facilitates descrambling received synchronization codes in a wireless communication environment, comprising
decode the received primary synchronization code (PSC) to identify the PSC index;
recognize the scrambling code used by the base station from the set of possible scrambling codes depending on the PSC index, and the possible scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation; and
decode the received secondary synchronization code (SSC) using the scrambling code used by the base station.
27. The method according to p, further consisting in the fact that
form individual M-sequences from dissimilar corresponding generating polynomials; and
use separate M-sequences from possible scrambling codes in the set.
28. The method according to p, further consisting in the fact that
form a common M-sequence from a common generating polynomial; and
create possible scrambling codes in the set based on a common M-sequence and differing corresponding cyclic shifts.
29. The method according to p, further consisting in the fact that
generating binary approximations of the set of PSCs by quantizing the values of I and Q of the complex numbers included in each of the PSCs; and
use the binary approximations of each of the plurality of PSCs as possible scrambling codes in the set.
30. The method according to p, further consisting in the fact that
form a lot of complementary Gowley sequences; and
use a variety of Goule complementary sequences as possible scrambling codes in the set.
31. The method according to p, in which the possible scrambling codes in the set are predefined.
32. The method of claim 26, further comprising changing the length of one or more of the possible scrambling codes in the set.
33. A wireless communication device comprising
a memory that stores instructions related to decoding the received primary synchronization code (PSC) for identifying the PSC index, recognizing the scrambling code used by the base station from the set of possible scrambling codes depending on the PSC index, and the possible scrambling codes in the set are designed to minimize the ratio peak power to average power and minimize cross-correlation, and decoding the received secondary synchronization code (SSC) using scrambling code of the base station; and
a processor attached to memory configured to execute instructions stored in memory.
34. The wireless communications apparatus of claim 33, wherein each of the possible scrambling codes in the set is based on a separate M-sequence, and each of the individual M-sequences is formed from a dissimilar generating polynomial.
35. The wireless communications apparatus of claim 33, wherein each of the possible scrambling codes in the set is based on a common M-sequence with dissimilar cyclic shift, and a common M-sequence is formed from a common generating polynomial.
36. The wireless communications apparatus of claim 33, wherein each of the possible scrambling codes in the set is based on a binary approximation of the corresponding PSC from the set of possible PSCs, possible PSCs are generated from Zadov-Chu sequences, and the binary approximation includes quantized values of I and Q complex numbers contained in possible PSC.
37. The wireless communications apparatus of claim 33, wherein each of the possible scrambling codes in the set is based on a corresponding complementary Gowley sequence.
38. The wireless communications apparatus of claim 33, wherein the memory further stores instructions related to adjusting the length of one or more possible scrambling codes in the set by at least one of truncation, decimation, or repetition.
39. A wireless communication device that enables descrambling a received secondary synchronization code in a wireless communication environment, comprising
means for determining the scrambling code used by the base station from the set of scrambling codes depending on the index corresponding to the received primary synchronization code (PSC), and the scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation; and
means for descrambling the received secondary synchronization code (SSC) using the scrambling code used by the base station.
40. The wireless communications apparatus of claim 39, wherein each of the possible scrambling codes in the set is based on a separate M-sequence, and each of the individual M-sequences is formed from a dissimilar generating polynomial.
41. The wireless communications apparatus of claim 39, wherein each of the possible scrambling codes in the set is based on a common M-sequence with dissimilar cyclic shift, and a common M-sequence is formed from a common generating polynomial.
42. The wireless communications apparatus of claim 39, wherein each of the possible scrambling codes in the set is based on a binary approximation of the corresponding PSC from the set of possible PSCs, possible PSCs are generated from Zadov-Chu sequences, and the binary approximation includes quantized values of I and Q complex numbers contained in possible PSC.
43. The wireless communications apparatus of claim 39, wherein each of the possible scrambling codes in the set is based on a corresponding complementary Gowley sequence.
44. The wireless communications apparatus of claim 39, further comprising means for changing the length of one or more of the possible scrambling codes in the set to match the length of the received SSC.
45. A computer program product containing
machine-readable storage medium containing
a code for determining the scrambling code used by the base station from the set of scrambling codes depending on the index corresponding to the received primary synchronization code (PSC), and the scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation; and
a code for descrambling the received secondary synchronization code (SSC) using the scrambling code used by the base station.
46. The computer program product according to item 45, and the computer-readable storage medium further comprises a code for generating individual M-sequences from dissimilar respective generating polynomials and a code for using individual M-sequences as possible scrambling codes in the set.
47. The computer program product according to item 45, wherein the computer-readable storage medium further comprises a code for generating a common M-sequence from a common generating polynomial and a code for creating possible scrambling codes in the set based on the common M-sequence and different corresponding cyclic shifts.
48. The computer program product according to item 45, and the computer-readable storage medium further comprises a code for generating binary approximations of the set PSC by quantizing the values of I and Q complex numbers included in each of the PSC, and a code for using binary approximations of each of the set of PSC as possible scrambling codes in the set.
49. The computer program product according to item 45, wherein the computer-readable storage medium further comprises a code for generating a plurality of complementary Gowley sequences and a code for using the plurality of complementary Gowley sequences as possible scrambling codes in the set.
50. A device in a wireless communication system, containing
processor configured for
determining the scrambling code used by the base station from the set of scrambling codes depending on the index corresponding to the received primary synchronization code (PSC), and the scrambling codes in the set are designed to minimize the ratio of peak power to average power and minimize cross-correlation; and
descrambling the received secondary synchronization code (SSC) using the scrambling code used by the base station.
RU2010118486/08A 2007-10-11 2008-10-08 Scrambling codes for secondary codes of synchronisation in systems of wireless communication RU2450480C2 (en)

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US97935707P true 2007-10-11 2007-10-11
US60/979,357 2007-10-11
US12/245,931 2008-10-06
US12/245,931 US8503547B2 (en) 2007-10-11 2008-10-06 Scrambling codes for secondary synchronization codes in wireless communication systems

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EP (1) EP2213028B1 (en)
JP (1) JP5490705B2 (en)
KR (1) KR101141362B1 (en)
CN (1) CN101821977B (en)
AU (1) AU2008310934B2 (en)
BR (1) BRPI0817764A2 (en)
CA (1) CA2699865C (en)
ES (1) ES2620300T3 (en)
HK (1) HK1146985A1 (en)
HU (1) HUE032672T2 (en)
IL (1) IL204553A (en)
MX (1) MX2010003900A (en)
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PL (1) PL2213028T3 (en)
PT (1) PT2213028T (en)
RU (1) RU2450480C2 (en)
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